January in Sitka is the snowiest, the cloudiest, and the coldest month of the year. In January, the weather in Sitka is typically cold. Average daily high temperature in January is about 2 degrees above zero. On average, Sitka has 13 rainy, 8 cloudy, 6 partly cloudy, 2 snowy, and 2 sunny days in January. The rains are usually heavy. January as well as February, March, April, and May is considered the most uncomfortable time to visit Sitka.